Type
Recombinant
Description
IL-13 isanimmunoregulatorycytokineproducedprimarilybyactivatedTh4cells,andalsobymastcellsandNKcells.TargeteddeletionofIL-13 inmiceresultedinimpairedTh4celldevelopmentandindicatedanimportantroleforIL-13 intheexpulsionofgastrointestinalparasites.IL-13 exertsanti-inflammatoryeffectsonmonocytesandmacrophagesanditinhibitstheexpressionofinflammatorycytokinessuchasIL-1β,TNF-α,IL-6 andIL-8. IL-13 hasalsobeenshowntoenhanceBcellproliferationandtoinduceisotypeswitching,resultinginincreasedproductionofIgE.BlockingofIL-13 activityinhibitsthepathophysiologyofasthma.HumanandmurineIL-13 arecross-speciesreactive.A variantofIL-13 showsenhancedfunctionalactivitycomparedwiththewildtypeIL-13. PeproTech’s geneticvariant,termedRecombinantHumanIL-13 Variant,isamature115 aminoacidproteinwithasubstitutionofQforRatposition112. ThecalculatedmolecularweightofRecombinantHumanIL-13 Variantis12.6 kDa.
AminoAcidSequence
MSPGPVPPSTALRELIEELVNITQNQKAPLCNGSMVWSINLTAGMYCAALESLINVSGCSAIEKTQRMLSGFCPHKVSAGQFSSLHVRDTKIEVAQFVKDLLLHLKKLFREGQFN
Source
E.coli
Purity
98%
BIOLOGicalActivity
ThisIL-13 analogshowsatwofoldincrease,relativetowildtypeIL-13,inbioactivityasmeasuredbythein-vitrodosedependentactivationofSTAT6andIL-13 dependentgeneinductionintransfectedA201.1 cells. ThisanaloghasalsobeenshowntoexhibitincreasedinvivoactivitycomparedtowildtypeIL-13,asmeasuredbytheinductionofairwayhyper-responsiveness.
Endotoxin
Endotoxinlevelis<0.1 ng/μgofprotein(<1EU/μg).
Reconstitution
Centrifugethevialpriortoopening.Reconstituteinwatertoaconcentrationof0.5–1.0 mg/ml.Note:Allowthereconstitutedvialtositat4oCforat≥2 hoursbeforeuse.Donotvortex.Thissolutioncanbestoredat2–8°Cforupto1 week.Forextendedstorage,itisrecommendedtofurtherdiluteinabuffercontainingacarrierprotein(example0.1%BSA)andstoreinworkingaliquotsat –20°Cto –80°C.
Storage/Expiration
–20°C
